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标题: 求解5月JJ一道数学题 [打印本页]

作者: wonderling66 时间: 2009-5-27 15:20
标题: 求解5月JJ一道数学题

PS.A research station records the temperature of each day for a whole year, from Oct 1st through Sep 30th.
For the first 182 days, lowest value 1 degree, median 29 degrees, highest temperature 41 degrees.
For the left 183 days, lowest temperature 38 degrees, median 71 degrees, highest 90 degrees.
Which of the following is a possible median of the whole year's temperature?
A. 36
B. 39
C. 43
D. 47

答案有人说是B

请问是怎么算的？？？

作者: qiuhailing01 时间: 2009-5-27 23:53

我的理解:全年的中间数是第183个.

将前182个温度数值与后183个数值从小到大排列,则第183个位于38度与41度之间,选项中只有B是符合这个条件的.

作者: wonderling66 时间: 2009-5-27 23:58

谢谢qiuhailing01

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